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Effect of jetties in northern part of coastal change at Chumphon estuary
Author(s)
Date Issued
January 1, 2018
Type
Conference Paper
Abstract
The research on the effect of coastal facilities for protecting an estuary from channel blockage and a coast from beach erosion by waves demands to understand wave propagation, a nearshore current and sediment transportation. The purpose of this research is to evaluate the effect of jetties to the Chumphon estuary coast in Chumphon province, Thailand, and propose measures for erosion protecting in this coast. The long term prediction by a one-line model indicates the heavy erosion of around 1000 m northward from the jetties, the erosion around 250 m and 650 m southward from the jetties. As for the erosion of around 250 m southward, measures were examined in the last inter-national conference of ISOPE. As for the erosion of around 650 m southward, since there is no property which should be protected, it is ignored here. Therefore, about the heavy erosion of around 1000 m northward, measures are examined. In this study, since almost of all sand must be transported to jetties, sand nourishment is not a good measure. Detached breakwaters, artificial reefs, and non-measures are examined with the costs on the construction or the compensation, and the prevention effect of wave overtopping, short term erosion, and deterioration of a view. It makes clear that the most effective measure is non-measures (in other words, it is “set back”).
Citation
Proceedings of the International Offshore and Polar Engineering Conference, 2018-June, 1379-1386, 2018